<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<style>
body {
    font-size: 16px;
    font-family: 'Helvetica', 'Arial', sans-serif;
    text-align: center;
    background-color: #f8faff;
    padding: 100px;
  }
h2{
  padding-bottom:2em
}
  .button {
  display: inline-block;
  padding: 1em 2em;
  background-color: #ff0081;
  /* background-color: transparent; */
  color: #fff;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  position: relative;
  box-shadow: 0 2px 25px rgba(233, 30, 99, 0.5);
  outline: 0;
  transition: transform ease-in 0.1s, background-color ease-in 0.1s,  box-shadow ease-in 0.25s;
}

.button::before{
  position: absolute;
  content: '';
  left: -2em;
  right: -2em;
  top: -2em;
  bottom: -2em;
  pointer-events: none;
  transition: ease-in-out .5s;
  background-repeat: no-repeat;
  background-image: radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%),
  /*  */
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%),
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%), 
  radial-gradient(circle, #ff0081 20%, transparent 20%);
  background-size: 10% 10%, 20% 20%, 15% 15%, 20% 20%, 18% 18%, 10% 10%, 15% 15%, 10% 10%, 18% 18%,
  15% 15%, 20% 20%, 18% 18%, 20% 20%, 15% 15%, 10% 10%, 20% 20%;
  background-position: 18% 40%, 20% 31%, 30% 30%, 40% 30%, 50% 30%, 57% 30%, 65% 30%, 80% 32%, 15% 60%,
  83% 60%, 18% 70%, 25% 70%, 41% 70%, 50% 70%, 64% 70%, 80% 71%;
  animation: bubbles ease-in-out .75s forwards;
}

.button:active {
  transform: scale(0.95);
  background-color: #f3037c;
  box-shadow: 0 2px 25px rgba(233, 30, 99, 0.5);
}
.button:active::before {
  animation: none;
  background-size: 0;
}
@keyframes bubbles {
  0% {
    background-position: 18% 40%, 20% 31%, 30% 30%, 40% 30%, 50% 30%, 57% 30%, 65% 30%, 80% 32%, 15% 60%,
  83% 60%, 18% 70%, 25% 70%, 41% 70%, 50% 70%, 64% 70%, 80% 71%;
  }
  50% {
    background-position: 10% 44%, 0% 20%, 15% 5%, 30% 0%, 42% 0%, 62% -2%, 75% 0%, 95% -2%, 0% 80%,
  95% 55%, 7% 100%, 24% 100%, 41% 100%, 55% 95%, 68% 96%, 95% 100%;
  }
  100% {
    background-position: 5% 44%, -5% 20%, 7% 5%, 23% 0%, 37% 0, 58% -2%, 80% 0%, 100% -2%, -5% 80%,
  100% 55%, 2% 100%, 23% 100%, 42% 100%, 60% 95%, 70% 96%, 100% 100%;
    background-size: 0% 0%;
  }
}
</style>
<body>
  <h2>鼠标点击试试~<h2>
    <button class="button">Button</button>
</body>
</html>